Cummins EGR Technology Makes Progress

Cummins Inc has achieved a milestone in development of cooled exhaust gas recirculation (EGR) technology required to meet future emissions requirements, which are legislated at 2.5 grams oxides of nitrogen (NOx) plus non-methane hydrocarbon (NMHC). This technology was successfully demonstrated on the Cummins B Series engine and is also being applied to its other medium- and heavy-duty products currently in field test.

Cummins achieved a 2% improvement in fuel economy compared with its current product, reduced NOx by 50%, and reduced the time of unaided cold starts more than 80%. In addition, the throttle response of the engine significantly improved as a result of the variable geometry turbocharging (VGT).

Exhaust gas recirculation technology allows a portion of exhaust gas to be reused, reducing exhaust emissions. To take advantage of this technology, Cummins used VGT developed by its wholly owned subsidiary, Holset.